A Practical Design Approach for Single-Inductor Multiple-Output (SIMO) DC-AC Inverter

This paper presents a practical design approach for achieving a compact, economical and scalable single-inductor multiple-output (SIMO) DC-AC inverter for multi-coil wireless power transfer (WPT) applications. The hardware prototype of this SIMO inverter employs small industrial-grade surface-mount passive components with low equivalent series resistance (ESR) and an integrated two-channel MOSFET in a low-profile single chip package. A 16-bit on-board low-cost microcontroller (MCU) is used to generate proper input logic signals for all the gate drivers. Results show that a compact, cost-effective and highly-efficient SIMO inverter that can be turned into a commercial product for practical applications, is achievable by using this approach.